EP3523496B1 - Bohrkrone - Google Patents

Bohrkrone Download PDF

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Publication number
EP3523496B1
EP3523496B1 EP16787756.2A EP16787756A EP3523496B1 EP 3523496 B1 EP3523496 B1 EP 3523496B1 EP 16787756 A EP16787756 A EP 16787756A EP 3523496 B1 EP3523496 B1 EP 3523496B1
Authority
EP
European Patent Office
Prior art keywords
hard material
drill bit
head
seat
drill
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP16787756.2A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3523496A1 (de
Inventor
Romain Clesen
Gerhard Meier
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TMT Tapping Measuring Technology SARL
Original Assignee
TMT Tapping Measuring Technology SARL
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by TMT Tapping Measuring Technology SARL filed Critical TMT Tapping Measuring Technology SARL
Publication of EP3523496A1 publication Critical patent/EP3523496A1/de
Application granted granted Critical
Publication of EP3523496B1 publication Critical patent/EP3523496B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00—Drill bits
    • E21B10/36—Percussion drill bits
    • E21B10/38—Percussion drill bits characterised by conduits or nozzles for drilling fluids
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B7/00—Blast furnaces
    • C21B7/12—Opening or sealing the tap holes
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00—Drill bits
    • E21B10/36—Percussion drill bits
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00—Drill bits
    • E21B10/46—Drill bits characterised by wear resisting parts, e.g. diamond inserts
    • E21B10/54—Drill bits characterised by wear resisting parts, e.g. diamond inserts the bit being of the rotary drag type, e.g. fork-type bits
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00—Drill bits
    • E21B10/46—Drill bits characterised by wear resisting parts, e.g. diamond inserts
    • E21B10/56—Button-type inserts

Definitions

  • the present invention relates to a drill bit for drilling, in particular rotary percussion drilling, a hole, in particular a tap hole of a melting furnace, the drill bit having a drill head with at least one hard material insert and a base body for connection to a drive element, the hard material insert being inserted into an axial end face of the Drill head designed receptacle is used such that the hard material insert protrudes with at least one head cutting edge of the axial end surface.
  • a drill bit of the type mentioned is from the RU 2 581 059 C1 known.
  • the known drill bit has hard metal inserts arranged on an axial end face of a drill head, which are received in groove-shaped recesses and each have a head cutting edge projecting beyond the axial end face. To fasten the hard metal inserts, they are secured in the groove-shaped receptacles via a hard solder connection.
  • the present invention is based on the object of proposing a drill bit which enables a thermally loadable and at the same time easy to produce mechanical connection between the hard material inserts and a drill head of the drill bit.
  • the drill bit according to the invention has the features of claim 1.
  • the flank section arranged opposite a recess formed in the hard material insert is provided with a material web which is formed at least partially from a welding material, is firmly connected to the drill head via the welding material and protruding into the recess to form a positive connection with the hard material insert.
  • the drill bit according to the invention accordingly has, by means of the material web engaging in the recess of the hard material insert, an engagement connection which, in combination with the opposing flank sections, clearly fixes the hard material insert in its relative position with respect to the drill head, so that a defined positioning of the head cutting edge formed on the hard material insert in the drill head is secured, and thus the desired cutting effect of the head cutting edge can be achieved reproducibly during the drilling process.
  • the material web can be designed in any way and accordingly does not have to have a shape designed to match the outer shape of the hard material insert. Rather, it is possible to simply design the material web in the shape of a bar or cuboid in order to enable the necessary engagement in the recess of the hard material insert.
  • connection of the material web, which engages in the hard material insert in a form-fitting manner, with the drill head is embodied in a materially bonded manner via the welding material as a welded connection; unlike a sleeve, which not only has to be adapted to the shape of the hard material insert in order to accommodate the hard material insert, but also in its shape to the receptacle in the drill head, the material web can simply be welded to the flank of the receptacle via a connecting joint.
  • the material web protruding into the recess of the hard material insert can be made entirely of welding material, so that apart from the welding material itself, no further material or component is necessary to create the connection between the hard material insert and to manufacture the drill head.
  • the material web is designed as a weld point, so that the production of the weld connection apart from the feed movement of a welding head to the welding point does not require any further relative movement between the welding head and the drill head.
  • weld point at least partially fills both a recess formed in the hard material insert next to the recess and a recess formed in the opposite flank section of the receptacle, it is possible to produce a particularly resilient weld point connection.
  • the receptacle in the drill head has an essentially radial longitudinal extent in relation to an axis of rotation of the drill head and an opening at the radially outer end, the hard material insert having a corresponding radial longitudinal extent being received in the receptacle in such a way that the hard material insert protrudes beyond a circumferential surface of the drill head with a radial projection relative to the axis of rotation.
  • the hard material insert with a holding extension which is essentially parallel to the axis of rotation of the drill head and which is inserted into a receiving base of the receptacle trained bottom recess engages.
  • a particularly effective configuration of the hard material insert which contributes to increasing the performance, is possible if the radial protrusion of the hard material insert forms a peripheral cutting edge which extends essentially parallel to the axis of rotation of the drill head.
  • the circumferential cutting edge extends from the head cutting edge protruding beyond the axial end surface of the drill head beyond the base of the receptacle, in such a way that a cutting edge foot of the circumferential cutting edge is received in a second base recess in the base of the receptacle, the occurrence of vibrations of the hard material insert counteracting support of the hard material insert in the drill head is ensured.
  • a plurality of hard material inserts, each inserted in a receptacle, are preferably arranged distributed over the circumference of the end face of the drill head.
  • At least two hard material inserts have a different radial longitudinal extent in relation to the axis of rotation of the drill head, such that radially inner ends of the head cutting edges have a different distance from the axis of rotation of the drill head, so that the cutting performance of the drill bit can be further optimized.
  • a configuration of the drill bit can also be provided in which the receptacle is cylindrical, in particular as a bore, and the hard material insert has an essentially complementary design to the receptacle, having holding extension inserted into the receptacle.
  • the hard material insert has a first and a second head cutting edge which are arranged parallel to one another and extend radially to the axis of rotation of the drill bit.
  • the recess formed in the hard material insert has a flattening that adjoins a shoulder to form the recess and extends to a head cutting edge, particularly good accessibility of the recess is ensured when the welding material is applied to form the material web.
  • the flattened area is preferably arranged in a plane arranged at right angles to the head cutting edge.
  • the hard material insert has, opposite the flattened area and above the holding extension, a radial overhang extending in the direction of the head cutting edge and protruding beyond the mating flank section, so that the length of the head cutting edge is not restricted by the flattening.
  • Fig. 1 shows a drill head 10 for forming an in Fig. 5 drill bit 11 shown.
  • the drill head 10 has a base body 12 which rotates about an axis of rotation R when connected to a suitable drive element, not shown in detail, of a drive device.
  • the base body 12 has an axial end surface 13 which is provided with receptacles 14, which are provided with hard material inserts 16 for producing the drill bit 11, which inserts 16 can be formed, for example, as shaped bodies made of tungsten carbide.
  • the axial end surface 13 equipped with the hard material inserts 16 is directed with contact pressure against the tamping compound closing the tap hole in order to carry out a rotary or rotary percussion drilling, in the latter case the axis of rotation is also the percussion axis.
  • the receptacles 14 are aligned with their longitudinal axes 15 perpendicular to the axis of rotation R and each radially.
  • a shaped body 17 of the hard material insert 16 has a head cutting edge 18 on an upper longitudinal edge and a peripheral cutting edge 19 on an axial end.
  • a number of hard material inserts 16 corresponding to the number of receptacles 14 is inserted into the receptacles 14 in such a way that a holding extension 21 formed on an underside 20 of the shaped body 17 extends into a floor recess 22 a receiving base 23 of the receiving element 14 extends essentially parallel to the axis of rotation 12.
  • the molded body 17 has on its underside 20 a further extension formed by a cutting edge foot 24 of the peripheral cutting edge 19, which engages in a second bottom recess 25 of the receiving base 23, which is arranged in the area of an opening 26 formed at the outer radial end of the receiving 14 so that the circumferential cutting edge 19 forms a radial protrusion which projects beyond a circumferential surface 28 of the base body.
  • the hard material inserts 16 are inserted into the receptacles 14 of the axial end surface 13 of the drill head 10 in such a way that the hard material inserts 16 between a flank section 29 and an opposing counter-flank section 30 of the receptacles 14, which in the present case run parallel to the longitudinal axis 15 of the receptacles 14, are included.
  • the hard material inserts 16 are arranged with a front side 31 adjacent to the flank section 29 and with a rear side 32 adjacent to the counter flank section 30.
  • the hard material inserts 16 are provided with a recess 40 formed following a recess 33, which is arranged opposite a recess 34 formed in the counter-flank section 30, the recesses 40, 34 in the present case being designed complementary in such a way that the recesses 40 and 34 complement each other at least in some areas to form a bore-shaped recess which at least partially provides a receiving space for a material web 35, as in FIG Fig. 6 shown, or a material web 36, as in Fig. 7 illustrated, trains.
  • the formation of the material web 35 is based on the in Fig. 4 illustrated configuration in which the hard material inserts 16 in the Recesses 14 are inserted and the recesses 40 in the hard material inserts 16 are located opposite the recesses 34 in the counter-flank sections 30 of the receptacles 14, in such a way that by a point-like build-up weld in which the welding material 37 is introduced into the recess 34 and with the counter-flank section 30 of the recess 14 is welded, the material web 35 is formed such that it extends from the recess 34 in the counter-flank section 30 into the recess 40 of the hard material inserts 16. A material connection is formed between the welding material 37 and the base body 14.
  • the material web 35 which is formed from the welding material during the build-up welding engages in a form-fitting manner in the recess 40 in the hard material inserts 14, without a material connection taking place.
  • a compressive force can be exerted by the material web 35 on the hard material inserts 16, which leads to the front sides 31 of the hard material inserts 16 frictionally resting against the flank sections 29 of the receptacles 14 formed in the base body 14 thus an exactly defined relative arrangement of the hard material inserts 16 to achieve a correspondingly precisely defined cutting edge geometry on the axial end surface 13 can be realized.
  • the material web 36 is not is formed exclusively from the welding material 37, but to form a defined contact contour 38, which is adapted to the recess 40 in the molded body 17 of the hard material inserts 16, a connector 39 made of a weldable material engages in the recess 40 of the molded body 17.
  • connection piece 39 thus not only functions as a form-fitting engagement body, but also as a force introduction for the defined transmission of the compressive force generated by the build-up welding to the hard material inserts 16.
  • a drill head 42 is provided with hard material inserts 43 which are received in cylinder-shaped receptacles 44, the hard material inserts 43 having a holding extension 45 which is essentially complementary to receptacle 44 and inserted into receptacle 44.
  • Fig. 10 shows a hard material insert 43 in detail.
  • the hard material inserts 43 have a first head cutting edge 46 and a second head cutting edge 47, which are arranged parallel to one another and extend radially to the axis of rotation R of the drill bit 41.
  • Recesses 48 formed in each of the hard material inserts 43 have a flattening 50 adjoining a shoulder to form a recess 49, which extends as far as the head cutting edges 46, 47 and is arranged in a plane arranged at right angles to the head cutting edges 46, 47. Between a flank section 54 and the flattened area 50, a material web 53 formed by welding of welding material 37 on the flank section 54 extends into the recess 48 in a form-fitting manner.
  • the hard material inserts 43 Opposite the flattened area 50 and above the holding extension 45, the hard material inserts 43 have a radial protrusion 52 which extends in the direction of the head cutting edges 46, 47 and projects beyond a counter-flank section 51.

Landscapes

  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Fluid Mechanics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Earth Drilling (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
EP16787756.2A 2016-10-10 2016-10-10 Bohrkrone Active EP3523496B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2016/074231 WO2018068818A1 (de) 2016-10-10 2016-10-10 Bohrkrone

Publications (2)

Publication Number Publication Date
EP3523496A1 EP3523496A1 (de) 2019-08-14
EP3523496B1 true EP3523496B1 (de) 2020-12-02

Family

ID=57208258

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16787756.2A Active EP3523496B1 (de) 2016-10-10 2016-10-10 Bohrkrone

Country Status (8)

Country Link
US (1) US11306541B2 (pt)
EP (1) EP3523496B1 (pt)
JP (1) JP6785977B2 (pt)
KR (1) KR102291684B1 (pt)
CN (1) CN110036175B (pt)
BR (1) BR112019007179B1 (pt)
RU (1) RU2712994C1 (pt)
WO (1) WO2018068818A1 (pt)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108941701A (zh) * 2018-08-28 2018-12-07 山东托普森金刚石钻头有限公司 一种耐热耐磨一体式强化钻头及其制作方法

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU108033A1 (ru) * 1957-02-19 1957-11-30 Э.А. Акопов Форма выполнени зубка из твердого сплава дл буровых шарошек
US3563325A (en) * 1968-09-16 1971-02-16 Kennametal Inc Percussion bit
DE4430784C1 (de) 1994-08-30 1996-01-18 Reburg Patentverwertungs Gmbh Bohrkopf
US5678645A (en) * 1995-11-13 1997-10-21 Baker Hughes Incorporated Mechanically locked cutters and nozzles
DE10053344A1 (de) * 2000-10-27 2002-05-08 Hilti Ag Gesteinsbohrer
ES2236562T3 (es) * 2001-08-01 2005-07-16 Techmo Entwicklungs- Und Vertriebs Gmbh Corona de taladrar.
AU2003200561B9 (en) 2003-02-19 2009-07-02 Sandvik Intellectual Property Ab Drill bit
US7070011B2 (en) 2003-11-17 2006-07-04 Baker Hughes Incorporated Steel body rotary drill bits including support elements affixed to the bit body at least partially defining cutter pocket recesses
DE602007011575D1 (de) * 2006-02-23 2011-02-10 Baker Hughes Inc Reserveschneideinsatz für rotationsbohrspitze
US7686103B2 (en) * 2007-06-06 2010-03-30 San Juan Coal Company Drill bit with radially expandable cutter, and method of using same
UA34200U (uk) * 2008-06-12 2008-07-25 Сергій Георгійович Ахбаш Коронка для ударно-обертального буріння
JP5360532B2 (ja) * 2008-07-16 2013-12-04 株式会社スターロイ 超硬工具及びその製造方法
US9133667B2 (en) * 2011-04-25 2015-09-15 Atlas Copco Secoroc Llc Drill bit for boring earth and other hard materials
RU2581059C1 (ru) * 2015-03-26 2016-04-10 ООО "Камышинский завод бурового инструмента" (ООО "КЗБИ") Коронка для ударно-вращательного бурения

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
CN110036175A (zh) 2019-07-19
US20190277094A1 (en) 2019-09-12
EP3523496A1 (de) 2019-08-14
JP6785977B2 (ja) 2020-11-18
US11306541B2 (en) 2022-04-19
WO2018068818A1 (de) 2018-04-19
RU2712994C1 (ru) 2020-02-03
KR102291684B1 (ko) 2021-08-20
BR112019007179B1 (pt) 2022-07-12
CN110036175B (zh) 2020-08-04
KR20190062473A (ko) 2019-06-05
JP2019534406A (ja) 2019-11-28
BR112019007179A2 (pt) 2019-06-25

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